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From Len Bellemore <Len.Bellem...@ControlCircle.com>
Subject RE: copying template to new zone
Date Fri, 01 Nov 2013 16:05:39 GMT
Thanks a lot for your input, Geoff,

What I did to get around it was to redeploy the template on the second zone by following the
instructions on page 46 of the Administration Guide:

# /usr/share/cloudstack-common/scripts/storage/secondary/cloud-install-sys-tmplt -m /
mnt/secondary -u http://download.cloud.com/templates/4.2/systemvmtemplate-2013-07-12-
master-xen.vhd.bz2 -h xenserver -s <optional-management-server-secret-key> -F

Once I did this, my SSVM was able to start.  Once it started, it proceeded to re-download
the system vm template again (not sure why it did that)

Any templates that I had flagged as "cross-zone" also began to copy across to my second zone.

I guess what I didn't realize is that once the system vm template is installed (via the Management
Servers) that the SSVM's take over at that point and that they transfer images between zones
via the public internet.  I thought that it would occur via either the management or the storage
network.

It's been a great learning exercise.  Albeit a frustrating one!

Thanks again for your help.

Len

-----Original Message-----
From: Geoff Higginbottom [mailto:geoff.higginbottom@shapeblue.com]
Sent: 31 October 2013 20:56
To: <users@cloudstack.apache.org>
Subject: Re: copying template to new zone

Hi Len,

The Management network needs to stretch across the DCs so that the management servers can
manage infrastructure in each DC.  Equally important is the optional storage network which
is used for secondary storage.  If used, this must be accessible from the hosts within the
Zone, but also ALL management servers.

If you have deployed additional management servers in the 2nd Zone/DC (highly recommended)
you can try manually deploying the system VM template again, however this should happen automatically
and if it isn't, it's highlighting a potential problem with your design.

In the future when you deploy new standard templates which are flagged as being available
in all zones, the SSVM(s) downloading the Templates need to be able to write to the appropriate
secondary storage.  However at the moment I'm guessing you do not have an SSVM running in
the new Zone, as the system VM template has not been copied there yet.

The management servers should always have access to secondary storage as they are responsible
for deploying the System VM template, not only during initial deployment, but during upgrades
when a new template may be required, or if you need to deploy a new template due to corruption
etc.

Regards

Geoff Higginbottom
CTO / Cloud Architect


D: +44 20 3603 0542<tel:+442036030542> | S: +44 20 3603 0540<tel:+442036030540>
| M: +447968161581<tel:+447968161581>

geoff.higginbottom@shapeblue.com<mailto:geoff.higginbottom@shapeblue.com> | www.shapeblue.com

ShapeBlue Ltd, 53 Chandos Place, Covent Garden, London, WC2N 4HS



On 31 Oct 2013, at 15:40, "Len Bellemore" <Len.Bellemore@ControlCircle.com<mailto:Len.Bellemore@ControlCircle.com>>
wrote:

Hi Guys,

I'm running Cloudstack 4.2 on XenServer 6.1.

I have recently created a new zone.  I'm having an issue with the system vms being created
and I wanted some clarification on how exactly the system vm template gets sent across to
my new zone.  It looks like CS is realising that the template is already in my first zone,
so rather than downloading it again, it is trying to copy it across to the new zone.

The problem I have with that is that I am using a specific storage network that is not directly
mountable from my Management Servers.  When I initially set up my first zone, I had to temporarily
give my management server a second NIC on my storage network in order for the system vm to
be downloaded and then moved to my secondary storage.

However, in my new zone, the networking is set up in such a way that although I can temporarily
connect my management server to the storage network in the new zone, I am unable to connect
it to the storage network in my original zone.

So, am I right in thinking that the management server in my new zone is trying to mount secondary
storage in my original zone to copy the system vm template across?  If so, is there a way
around this?  Can I get it to download direct from the internet again?

Thanks
Len

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